Stepwise multiple regressions indicated that the most important variables governing the variation in the biological community composition were pond size, average annual daily traffic, metals, chloride, distance to the closest pond from study pond, dissolved oxygen, hydrocarbons, and phosphorus.
The observed effects on crops resulting from biochar soil amendments have primarily been explained by improved nutrient retention [ 18], increased pH and altered soil physical properties [ 19], improved mycorrhizal fungi colonization [ 20] and altered soil biological community composition and abundance [ 18, 21].
There Cowles encountered a series of plant communities that he interpreted as a historical record of changes in vegetation, starting with a few hardy plants growing on unstable dunes and culminating in a climax community (that is, a mature, balanced biological community whose composition changes little over time) of deciduous forest growing on ancient dunes.
Molecular biological analyses of the microbial community composition in the floating layer showed no differences to the digestate.
In addition to these methodological implications, the observed spatial and temporal variability suggests a thermal and salinity habitat envelope that must be considered when attempting to interpret biological productivity, faunal abundance and community composition of benthic species living in and around groundwater seeps.
However, results from expeditions to the Lau Basin in the 1980's indicated that the chemical composition and biological community diversity near the ELSC vents were uniquely different from well-studied sites at EPR.
For all of these reasons, temporary waters lend themselves to surveys and experimental manipulations designed to test hypotheses about biological adaptation, population regulation, evolutionary processes, community composition and structure, and ecosystem functioning.
Furthermore, we provide an overview of the conceptual relations between soil biological properties (microbial abundance, species diversity, community composition and enzyme activity) and the mineralization and sequestration of SOC in eroded agricultural landscapes, which are often overlooked by previous research and reviews.
During the recovery period physico-chemical conditions were restored to the pristine state within about 35 days, whereas the recovery of the biological parameters was much slower and the community composition inside the former plume area had not recovered to the original state by the end of the experiment.
Usually, introduced species have to face novel physical, chemical and biological conditions such as climate, landscape patterns and community composition that differ from the donor area [ 1, 2].
The picture of biofilms increasingly is one in which there is both heterogeneity and a constant flux, as this biological community adapts to changing environmental conditions and the composition of the community.
